Terpolymer polyamide, polyamide resin composition containing the same, and automotive parts obtaining from these

Abstract

A crystalline terpolymer polyamide produced from: (a) an equimolar salt of hexamethylenediamine with adipic acid, (b) an equimolar salt of hexamethylenediamine with terephthalic acid, and (c) 12-aminododecanoic acid or omega -laurolactam; a polyamide resin composition comprising (A) the terpolymer polyamide and (B) a modified polyolefin; a polyamide resin composition comprising (A) the terpolymer polyamide, (B) the modified polyolefin, and (C) polyamide 12; a polyamide resin composition comprising (A) the terpolymer polyamide and (D) an inorganic filler and/or a flame retardant; and an automotive part comprising a molding one of these terpolymer polyamide and polyamide resin compositions.

What is claimed is: 
     
       1. A crystalline terpolymer polyamide produced from and consisting essentially of: (a) 20 to 80% by weight of an equimolar salt of hexamethylenediamine with adipic acid,   (b) 20 to 80% by weight of an equimolar salt of hexamethylenediamine with terephthalic acid, and   (c) 1 to 30% by weight of 12-aminododecanoic acid or ω-laurolactam.   
     
     
       2. A crystalline terpolymer polyamide as claimed in claim 1, wherein said crystalline polyamide is produced from: from 25 to 75% by weight said equimolar salt (a) of hexamethylenediamine with adipic acid,   from 25 to 75% by weight said equimolar salt (b) of hexamethylenediamine with terephthalic acid, and   from 5 to 20% by weight said 12-aminododecanoic acid or ω-laurolactam (c).   
     
     
       3. A polyamide resin composition consisting essentially of from 65 to 95% by weight (A) a crystalline terpolymer polyamide produced from: (a) an equimolar salt of hexamethylene diamine with adipic acid, (b) an equimolar salt of hexamethylenediamine with terephthalic acid, and (c) 12-aminododecanoic acid or ω-laurolactam and   from 5 to 35% by weight (B) a modified polyolefin produced by graft-polymerizing an α, β-unsaturated carboxylic acid or an anhydride or derivative thereof with a polyolefin.   
     
     
       4. A polyamide resin composition as claimed in claim 3, wherein said crystalline terpolymer polyamide (A) is a crystalline polyamide produced from: from 20 to 80% by weight said equimolar salt (a) of hexamethylenediamine with adipic acid, from 20 to 80% by weight said equimolar salt (b) of hexamethylenediamine with terephthalic acid, and from 1 to 30% by weight said 12-aminododecanoic acid or ω-laurolactam (c). 
     
     
       5. A polyamide resin composition as claimed in claim 4, wherein said modified polyolefin (B) is a modified polyolefin produced by graft-polymerizing an α, β-unsaturated carboxylic acid or an anhydride or derivative thereof with polyolefin in an amount of from 0.05 to 5 mol % based on the amount of the polyolefin. 
     
     
       6. A polyamide resin composition as claimed in claim 3, which comprises from 70 to 90% by weight said crystalline terpolymer polyamide (A) and from 10 to 30% by weight said modified polyolefin (B). 
     
     
       7. A polyamide resin composition consisting essentially of (A) a crystalline terpolymer polyamide produced from: (a) an equimolar salt of hexamethylenediamine with adipic acid, (b) an equimolar salt of hexamethylenediamine with terephthalic acid, and (c) 12-aminododecanoic acid or ω-laurolactam and   (D) at least one component selected from the group consisting of an inorganic filler and a flame retardant.   
     
     
       8. A polyamide resin composition as claimed in claim 7, wherein said component (D) is an inorganic filler, the amount of said filler being from 3 to 70 parts by weight per 100 parts by weight of said crystalline terpolymer polyamide (A). 
     
     
       9. A polyamide resin composition as claimed in claim 7, wherein said component (D) is a halogenated compound or an antimony compound, the amount of said compound being from 1 to 40 parts by weight per 100 parts by weight of said crystalline terpolymer polyamide (A). 
     
     
       10. An automotive part comprising a molding of said crystalline terpolymer polyamide as claimed in claim 1. 
     
     
       11. An automotive part comprising a molding of said polyamide resin composition as claimed in claim 3. 
     
     
       12. An automotive part comprising a molding of said polyamide resin composition as claimed in claim 7.